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Method for treating sodium bromide wastewater

A technology of sodium bromide and waste water, which is applied in chemical instruments and methods, filtration treatment, water/sewage treatment, etc., and can solve problems such as difficult treatment of concentrated waste water

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of method for processing sodium bromide waste water in order to overcome the problem that existing concentrated waste water is difficult to handle in the prior art

Method used

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  • Method for treating sodium bromide wastewater
  • Method for treating sodium bromide wastewater
  • Method for treating sodium bromide wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Treat the waste water 1 through a gel separation tank, air flotation, flocculation sedimentation, filter cotton filtration, ultrafiltration, and reverse osmosis. The rubber separation tank is a corrugated inclined plate type rubber separation tank; the air flotation pressure is 0.35MPa; the dosage of the flocculant polyaluminum chloride (polyaluminum chloride 28, purchased from Gongyi City Filter Industry Co., Ltd.) is 800mg / L, Coagulant aid polyacrylamide (molecular weight 800-2000, purchased from Gongyi City Filter Industry Co., Ltd.) dosage is 5mg / L, stirring time is 8min, and standing for 25min; the filter cotton is made of polypropylene, and the filtration accuracy is 5μm; the ultrafiltration membrane is Coriolis MP 8081-102 ultrafiltration membrane with an operating pressure of 0.2MPa and a temperature of 25°C; the reverse osmosis membrane is Hyde Energy PROC10 reverse osmosis membrane with an operating pressure of 1.5MPa. The reverse osmosis produced water...

Embodiment 2

[0039] Wastewater 2 was treated in the same manner as in Example 1, except that the inter-electrode voltage in step (2) was 1.2V.

Embodiment 3

[0041] The same method as in Example 1 is adopted, except that the inter-electrode voltage in step (2) is 1.4V.

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Abstract

The invention relates to the field of wastewater treatment, and discloses a method for treating sodium bromide wastewater, which comprises the following steps: (1) pretreating the sodium bromide wastewater to obtain concentrated wastewater in which sodium bromide is concentrated until the bromide ion concentration is not lower than 10000 mg / L; and (2) the wastewater is electrolyzed and concentrated in an electrolytic cell, the bromine elementary substance, hydrogen and a sodium hydroxide solution are obtained, and the electrolytic cell is an ion exchange membrane electrolytic cell. The method can be used for treating the sodium bromide wastewater and converting the concentrated wastewater containing high-concentration sodium bromide into an available resource at the same time.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating sodium bromide wastewater. Background technique [0002] Bromobutyl is a modified product of butyl rubber, which is produced by reacting butyl rubber with liquid bromine in a solution state. The basic production process of bromobutyl rubber includes base rubber production, sol, bromination reaction, neutralization, coagulation, and drying. Bromobutyl rubber and by-product hydrogen bromide are generated during the reaction between liquid bromine and butyl rubber. Sodium bromide is generated after neutralizing the by-product hydrogen bromide with sodium hydroxide solution. During condensation, sodium bromide enters the water in the condensation kettle, polluting the condensation water. Condensed water is quantitatively discharged according to the principle of material system balance to form bromine-containing salt sewage (that is, sodium bromide wastewate...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F9/10C25B1/24C25B1/16C25B1/04C25B9/19
CPCC02F9/00C25B1/24C25B1/16C25B1/04C02F1/46104C02F2201/46115C02F2201/46135C02F2201/4614C02F2201/4615C02F2209/08C02F2209/20C02F2209/10C02F2209/11C02F1/001C02F1/441C02F1/445C02F1/4693C02F1/04C02F1/447C02F1/26
Inventor 王镭钟林宋小飞李建华安婷婷
Owner CHINA PETROLEUM & CHEM CORP
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